This is the M5 Reference styli (red dot) #A-5555-3805. This is a styli with a high-strength stainless steel base and stem and a ruby ball.
| Styli | M5 |
| Ball Diameter (DK) | 8.0 mm |
| Overall length (L) | 63.5 mm |
| Stylus Base Width (DG) | 11 mm |
| EWL (ML) | 50.5 mm |
| Stem diameter (DS) | 6.0 mm |
| Stem material | Stainless Steel |
| Mass | 24.8 g |
